Yeah, but 240 is pretty damn mana intensive. You could use it, but you won't be hunting long. That's one reason I'm a fan of 140 + open handed/offensive channeling. You get +40 to every shot (or at least every shot that doesn't get warded) and only have to spend 40 mana every 90 seconds instead of every 30. Or if putting the runestaff away is too risky, even just runestaff + offensive is +20. There's some risk involved, but hey, if you had 50+ ranks of transformation lore, you'd have an extra use of 1150 to bail yourself out.
As far as spell aiming goes, if you take all those points from 2x SA and put them instead into empath circle, the difference usually only works out to be about 9 or 10 CS (at cap at least, assuming you'd stay above +20 empath ranks with either training path...probably works out about the same at 90). So while an extra 10 CS is pretty nice, the difference isn't as big as some folks make it out to be. I trained my empath in spell aiming all the way up through cap and still use bolts with some frequency, but mostly just because it's more interesting than casting Wither at everything.
That being said, Wither is almost always going to be a better choice than bolts. The only exception might be using 1110 to conserve mana against creatures that won't immediately kick your ass if you don't kill them quickly. Even if you only get 3 warding cycles from 1110 (note: you need 20 telepathy ranks for this, I noticed you only had 15), you can hit a creature with 1110 and let the warding cycles kill it while you move on to other things. I've actually started using 1110 in orc warcamps lately -- I'll hit an orc with one shot of 1110 and just go to another part of the camp to cast at another orc. When I come back later, the orc will usually be dead. Of course, I have 100 telepathy ranks, so I get 6 warding cycles. The problem with bolts, though, is that you gotta deal with both DS and EBP, and there's plenty of shit that I can't even touch with bolts even as a halfling (though with 1110 all you have to do is connect!)
Edit: I just noticed your DEX bonus is 4. You should probably not be bolting.